package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;


    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList) {

            Map map = new HashMap();
            map.put("begin", LocalDateTime.of(date, LocalTime.MIN));
            map.put("end", LocalDateTime.of(date, LocalTime.MAX));
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnoverList.add(turnover == null ? 0.0 : turnover);
        }

        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }

    @Override
    public UserReportVO getuserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Integer> newUserList = new ArrayList<>();
        List<Integer> totalUserList = new ArrayList<>();

        for (LocalDate date : dateList) {
            Map map = new HashMap();

            map.put("end", LocalDateTime.of(date, LocalTime.MAX));

            Integer totalUser = userMapper.countByMap(map);
            totalUserList.add(totalUser == null ? 0 : totalUser);

            map.put("begin", LocalDateTime.of(date, LocalTime.MIN));

            Integer newUser = userMapper.countByMap(map);
            newUserList.add(newUser == null ? 0 : newUser);
        }

        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .build();
    }

    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Integer> orderCountList = new ArrayList<>();
        List<Integer> validOrderCountLlist = new ArrayList<>();

        for (LocalDate date : dateList) {
            Map map = new HashMap();
            map.put("end", LocalDateTime.of(date, LocalTime.MAX));
            map.put("begin", LocalDateTime.of(date, LocalTime.MIN));

            Integer orderCount = orderMapper.countByMap(map);
            orderCountList.add(orderCount == null ? 0 : orderCount);

            map.put("status", Orders.COMPLETED);

            Integer validOrderCount = orderMapper.countByMap(map);

            validOrderCountLlist.add(validOrderCount == null ? 0 : validOrderCount);
        }

        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        Integer validOrderCount = validOrderCountLlist.stream().reduce(Integer::sum).get();

        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountLlist, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(totalOrderCount==0?0.0:validOrderCount.doubleValue()/totalOrderCount.doubleValue())
                .build();
    }

    @Override
    public SalesTop10ReportVO getTop10(LocalDate begin, LocalDate end) {
        List<GoodsSalesDTO> top10= orderMapper.getTop10(LocalDateTime.of(begin,LocalTime.MIN),LocalDateTime.of(end,LocalTime.MAX));
        String nameList = top10.stream().map(GoodsSalesDTO::getName).collect(Collectors.joining(","));
        String numberList = top10.stream().map(item->item.getNumber().toString()).collect(Collectors.joining(","));

        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    @Override
    public void exportBusinessData(HttpServletResponse response) {
        LocalDateTime begin = LocalDateTime.of(LocalDate.now().minusDays(30), LocalTime.MIN);
        LocalDateTime end = LocalDateTime.of(LocalDate.now().minusDays(1), LocalTime.MAX);

        BusinessDataVO businessData = workspaceService.getBusinessData(begin, end);

        InputStream is = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            XSSFWorkbook excel = new XSSFWorkbook(is);
            XSSFSheet sheet = excel.getSheetAt(0);
            sheet.getRow(1).getCell(1).setCellValue("时间："+LocalDate.now().minusDays(30)+" 至 "+LocalDate.now().minusDays(1));
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessData.getNewUsers());

            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getUnitPrice());

            for (int i = 0; i < 30; i++) {
                LocalDate date = LocalDate.now().minusDays(30 - i);
                businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7+i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());

            }
            ServletOutputStream os = response.getOutputStream();
            excel.write(os);

            os.close();
            excel.close();
            is.close();

        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}
